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Comment by flowerthoughts

8 months ago

Why is there a flight path along the Potomac river, right in front of a landing strip, at landing altitudes?

The article claims the helicopter was higher than it should have been, but isn't it safer to fly high across the airport if you're crossing?

There's a lot going on in a small area there. Even without helicopters, the main runway (01/19) is the busiest runway in the nation, and it points directly at a no-fly zone over the white house, so the approach has a complicated turn at the last moment. Directly across the river, there's a military base with a heliport. And those helicopters often transport important individuals inside of those areas and to areas up and down the river. Those helicopters aren't just casually flying through, they are doing things in the immediate area.

Just as an example, look at a map and take note of where DCA is, where the Marine One hangar is, and where the White House is. All of this stuff is right around the airport.

  • Doesn't fully explain why the military flight path runs right on front of the landing pattern for the main runway. Even with the proximity to each other, i don't see how that was necessary

    • This accident didn't involve the main runway, but runway 33. Although -- look at a map -- runway 33 points across the river to a military base with a heliport. It seems obvious as to why military helicopters would have to be there.

      Now, this particular flight wasn't landing there, but I don't think it is in any way confusing as to why military helicopters are in this area or taking these routes.

      This is inherently very complicated and high volume airspace, and there is a lot of helicopters because there are important leaders who use military helicopter transport, not commercial airports, but many of the places they might be landing are all around DCA.

      12 replies →

the military gets what it wants in DC, and the pilots were too comfortable and on different radio systems (helo can’t hear airplanes and vice versa, air traffic control is their intermediary)

A disaster waiting to happen in retrospect. Similar issues at other airports like runway incursions, especially at crowded small airports like SFO and LaGuardia with antiquated runway layouts.

  • Let's wait for the investigation to complete before we opine on what is or isn't a "disaster waiting to happen." The entire aviation system is a "disaster waiting to happen" unless you assume a baseline level of aircrew competence, and the question will be whether or not the aircrew fell victim to a systematic risk inherent in what they were doing, or whether they just screwed up.

    Sad to say, as a former aviator, I have seen it before where people died and families lost loved ones ultimately because of a systematic risk inherent in what they were doing, but also other times because someone flat-out just screwed up.

    • FTA:

      data recently analyzed by the board revealed that National Airport was the site of at least one near collision between an airplane and a helicopter each month from 2011 to 2024

      I would say that statistic in and of itself qualifies as a "disaster waiting to happen". I agree that we should wait for the full report, but I don't think the GP is using hyperbole in this case.

      3 replies →

    • Relying on seeing another aircraft in the air at night is pretty much a disaster waiting to happen.

      You don't see aircraft at night, you see lights. And they're over a city--a gazillion lights. Thus all you really see are moving lights. But if two objects are on a steady collision path neither moves relative to the other. Thus both sets of pilots would simply have seen stationary lights, invisible against a sea of stationary lights.

Training to evac politicians from what I understand. From wikipedia:

> "The helicopter was part of the Continuity of Government Plan, with the flight being a routine re-training of aircrew in night flight along the corridor."

Continuity of Government Plans is what they do when nukes get launched or a 9/11 sort of thing happens.

  • Should the people who had the most ability to prevent a global nuclear war be survivors of one?

    That seems like a misalignment of incentives.

    • Not sure what the next best option here is. There was a thought experiment once where it would require the president to kill the key holder in order to launch a nuclear attack (the launch codes would be embedded in the designated key holder's heart). In theory this would make sure the president knew the seriousness of his or her actions, but it was never seriously considered as a protocol.

    • Penn & Teller's book 'Cruel Tricks for Dear Friends' included a short story whose premise was a test to see if the president would be more likely to start a nuclear war if a safe bunker was available.

    • OTOH, turning "instigate a nuclear war" into a way to assassinate specific people also seems like a bad idea?

The helicopter did not cross the airport. The helicopter crossed the approach path to the airport, it was supposed to stay low enough not to be in the approach path. Then the pilot steered around the wrong plane and blundered right into the plane that they were supposed to be avoiding.

Politicians wanting contradictory things, oops.

  • Ironically it would probably be safer if the helicopter crossed directly over the airport. At least then airplanes are usually on the ground, except for the cases where someone has to abort a landing and go around. Still dangerous, but it should happen less often.

It's "safer" not to do a lot of things you do in military aviation, for one. And second, the flight path was deliberately plotted out requiring aircrew to maintain certain altitudes and stay within certain lateral boundaries to avoid other traffic. This is no different than any number of corridors like it around the country.

At some point, it's like saying "isn't it 'safer' not to take the freeway because everyone drives so fast?"

  • The appropriate analogy would be to take the freeway on a unicycle, naked. Otherwise known as inviting disaster.